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21838637388301 = 53514081225451
BaseRepresentation
bin1001111011100101101000…
…01110010101001000001101
32212022202100012002100202221
410331302310032111020031
510330301012132411201
6114240310450215341
74412534535660616
oct475626416251015
985282305070687
1021838637388301
116a5a794523398
122548583584551
13c254b41c0886
14556dd2258c0d
1527d1169694a1
hex13dcb439520d

21838637388301 has 4 divisors (see below), whose sum is σ = 21842718619104. Its totient is φ = 21834556157500.

The previous prime is 21838637388247. The next prime is 21838637388307. The reversal of 21838637388301 is 10388373683812.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21838637388301 - 225 = 21838603833869 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21838637388301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21838637388307) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2040607375 + ... + 2040618076.

It is an arithmetic number, because the mean of its divisors is an integer number (5460679654776).

Almost surely, 221838637388301 is an apocalyptic number.

It is an amenable number.

21838637388301 is a deficient number, since it is larger than the sum of its proper divisors (4081230803).

21838637388301 is an equidigital number, since it uses as much as digits as its factorization.

21838637388301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4081230802.

The product of its (nonzero) digits is 27869184, while the sum is 61.

The spelling of 21838637388301 in words is "twenty-one trillion, eight hundred thirty-eight billion, six hundred thirty-seven million, three hundred eighty-eight thousand, three hundred one".

Divisors: 1 5351 4081225451 21838637388301